65061511 has 4 divisors (see below), whose sum is σ = 65271024. Its totient is φ = 64852000.

The previous prime is 65061509. The next prime is 65061527. The reversal of 65061511 is 11516056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65061511 - 2¹ = 65061509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65061571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104290 + ... + 104911.

It is an arithmetic number, because the mean of its divisors is an integer number (16317756).

Almost surely, 2^65061511 is an apocalyptic number.

65061511 is a deficient number, since it is larger than the sum of its proper divisors (209513).

65061511 is a wasteful number, since it uses less digits than its factorization.

65061511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209512.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 65061511 is about 8066.0715965084. The cubic root of 65061511 is about 402.1993660582.

Adding to 65061511 its reverse (11516056), we get a palindrome (76577567).

The spelling of 65061511 in words is "sixty-five million, sixty-one thousand, five hundred eleven".